diff --git a/CMakeLists.txt b/CMakeLists.txt
index ac24bf41b..fdaa2f134 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -21,6 +21,18 @@
 #
 
 cmake_minimum_required(VERSION 2.8.12)
+
+# https://cmake.org/cmake/help/latest/policy/CMP0011.html
+# Setting this policy is required in CMake >= 3.18.0, otherwise a warning is generated. The OLD
+# policy setting is deprecated, and will be removed in future versions.
+cmake_policy(SET CMP0011 NEW)
+# https://cmake.org/cmake/help/latest/policy/CMP0012.html
+# Setting the CMP0012 policy to NEW is required for FindPython3 to work with CMake 3.18.2
+# (there is a bug in this particular version), otherwise, setting the CMP0012 policy is required
+# for CMake versions >= 3.18.3 otherwise a deprecated warning is generated. The OLD policy setting
+# is deprecated and will be removed in future versions.
+cmake_policy(SET CMP0012 NEW)
+
 if(TEST_CPP)
     project("mbed TLS" C CXX)
 else()